Also known as: M-56, Smartgun, m56
A Machine Gun from the 1986 Aliens (1986) film.
The M56 Smartgun is a self-targeting heavy Machine Gun attached to a harness that is used as a squad support weapon by the Colonial Marine Corps. An optical sensor in the gun detects moving targets and an alarm informs the operator when a target is acquired.
It was designed by Stan Winston and James Cameron using components from a steady cam harness, a WWII era German MG42 Machine Gun and several Motorcycle parts.